Dielectric to showcase reconfigurable manifold combiners for multi-station RF facilities at NAB Show

Dielectric introduces reconfigurable manifold combiners for multi-station RF facilities. Adaptable for FM radio and UHF television, Dielectric’s innovation introduces system expandability to manifold designs that have long only been expandable by adding constant impedance filter (CIF) units.

Company’s evolution can be experienced at NAB Show 2023 that takes place April 16-19, in Booth W3601 in the West Hall of the Las Vegas Convention Center.

The solution offers an option for sites installing new master broadcast antennas that can quickly add new tenants in the future, without the space constraints and assembly labor that CIF-based expansion requires.

Dielectric’s reconfigurable manifold combiners are essentially modular fixed units built to specification. For example, a site owner with five broadcasters today and a goal of seven total tenants can specify a manifold combiner with seven ports. Dielectric builds the initial system with five filters and protects the two open slots with shorted ports, or “shorts”. Shorts are removed as filters for new tenants, which Dielectric can also build in advance, are added to the manifold combiner.

Also, the company can provide calculations that consider how site owners can add other broadcast frequencies in the market in various combinations. “We first provide an analysis of the market that confirms how many potential stations in the market can logically join the master antenna system,” said Keith Pelletier, President, Dielectric. “We may find that number to be 10 broadcasters. The site owner ultimately decides how many broadcasters they want to accommodate immediately, and how many they want to add in the future. Using our High Frequency Simulation Software (HFSS) tools, we can calculate how each possible frequency will affect the combiner’s output splines. New tenants are added quickly and easily by simply removing a shorted port, plugging in a new filter and changing some transmission line.”

The likelihood of having extra site space is increased when using a manifold combiner. These are also revered for their consistent electrical specifications across all stations on the system, with similar loss and electrical characteristics across the chain.

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